Home
Class 12
MATHS
3 + 5 + 7 + .... to n terms is...

3 + 5 + 7 + .... to n terms is

A

n(n+2)

B

n(n-2)

C

`n^(2)`

D

`(n+1)^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • COMMON ENTRANCE TEST - 2014

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|60 Videos
  • COMMON ENTRANCE TEST - 2018

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|60 Videos

Similar Questions

Explore conceptually related problems

1 . 3+3 . 5+5 . 7+.. . . to n terms =

3+5+7+ …..sum to n terms

(1)/(1 . 4 . 7)+(1)/(4 .7 . 10)+(1)/(7 . 10 . 13)+.. . to n terms =

(1)/(1 . 3)+(1)/(3 . 5)+(1) /(5 . 7)+.. to n terms =

Prove 1.4.7+2.5.8+3.6.9+....... upto n terms =(n)/(4)(n+1)(n+6)(n+7)

If a=1+2+4+ . . . . upto n terms b=1+3+9+. . . . upto n terms c=1+5+25+. . . . upto n terms then Delta= |[a,2b,4 c],[2,2,2],[2^n,3^n,5^n]|=

If the n-th term of an arithmetic progression a_(n) = 24 - 3n then its 2nd term is

Find the sum to indicated number of terms in each of the geometric progressions in x^3,x^5,x^(7), .........n terms (if x ne pm 1 )

Prove by mathematical induction that 1.4+4.7+7.10+…. up to n terms =n(3n^(2)+3n-2)

If 3+5+9+17+33 sum to n terms of a series is 2^(n+1) '+ n-2 then n^(th ) term is

HIMALAYA PUBLICATION-COMMON ENTRANCE TEST - 2017-QUESTION BANK
  1. If A and B are finite sets and A subset B, then

    Text Solution

    |

  2. The value of cos ^(2)45^(@) - sin^(2)15^(@) is

    Text Solution

    |

  3. 3 + 5 + 7 + .... to n terms is

    Text Solution

    |

  4. If ((1+i)/(1-i))^(m)=1, then the least positive integral value of m is

    Text Solution

    |

  5. If |x-2|le 1, then

    Text Solution

    |

  6. If '^(n)C(12) = ""^(n)C(8) then n is equal to

    Text Solution

    |

  7. The total number of terms in the expansion of (x+a)^(47)-(x-a)^(47) af...

    Text Solution

    |

  8. Equation of line passing through the point (1,2) and perpendicular to ...

    Text Solution

    |

  9. The eccentricity of the ellipse (x^(2))/(36)+ (y^(2))/(16)=1 is

    Text Solution

    |

  10. The perpendicular distance of the point P(6,7,8) from XY-plane is

    Text Solution

    |

  11. The value of lim(theta to 0)(1-cos 4theta)/(1-cos 6 theta) is

    Text Solution

    |

  12. Write the converse and contrapositive of the statement " If x ...

    Text Solution

    |

  13. If coefficient of variation is 60 and standard deviation is 24, then a...

    Text Solution

    |

  14. The range of the function f(x) = sqrt(9-x^(2))

    Text Solution

    |

  15. Let f: R to R be defined by f(x) = x^(4), then

    Text Solution

    |

  16. The range of sec^(-1)x is

    Text Solution

    |

  17. If tan^(-1)x + tan^(-1)y=4pi//5, then cot^(-1)x + cot^(-1)y is equal t...

    Text Solution

    |

  18. If f(x) = 8x^(3), g(x) = x^((1//3)), then fog(x) is

    Text Solution

    |

  19. If A = 1/pi [(sin^(-1)(xpi),tan^(-1)(x/pi)),(sin^(-1)(x/pi),cot^(-1)(p...

    Text Solution

    |

  20. If a matrix A is both symmetric and skew symmetric, then

    Text Solution

    |